linux-kernel - [PATCH 5/9] ASoC: apple: mca: Factor out mca_be_get

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Message-Id: <20250518-mca-fixes-v1-5-ee1015a695f6@gmail.com>
Date: Sun, 18 May 2025 20:50:50 +1000
From: James Calligeros <jcalligeros99@...il.com>
To: Martin Povišer <povik+lin@...ebit.org>, 
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc: asahi@...ts.linux.dev, linux-sound@...r.kernel.org, 
 linux-kernel@...r.kernel.org, James Calligeros <jcalligeros99@...il.com>
Subject: [PATCH 5/9] ASoC: apple: mca: Factor out mca_be_get_fe

From: Martin Povišer <povik+lin@...ebit.org>

This is a function that we also want to use from within mca_be_shutdown,
so factor it out.

Signed-off-by: Martin Povišer <povik+lin@...ebit.org>
Signed-off-by: James Calligeros <jcalligeros99@...il.com>
---
 sound/soc/apple/mca.c | 31 ++++++++++++++-----------
 1 file changed, 18 insertions(+), 13 deletions(-)

diff --git a/sound/soc/apple/mca.c b/sound/soc/apple/mca.c
index 39713c378ba10910b0a3ac3d804844b25dfa2c94..7c3e1eae8b963ff593fdcf54e4a1f2e5f64a63c1 100644
--- a/sound/soc/apple/mca.c
+++ b/sound/soc/apple/mca.c
@@ -702,30 +702,35 @@ static bool mca_be_clk_started(struct mca_cluster *cl)
 	return false;
 }
 
-static int mca_be_startup(struct snd_pcm_substream *substream,
-			  struct snd_soc_dai *dai)
+static struct snd_soc_pcm_runtime *mca_be_get_fe(struct snd_soc_pcm_runtime *be,
+						 int stream)
 {
-	struct snd_soc_pcm_runtime *be = snd_soc_substream_to_rtd(substream);
-	struct snd_soc_pcm_runtime *fe;
-	struct mca_cluster *cl = mca_dai_to_cluster(dai);
-	struct mca_cluster *fe_cl;
-	struct mca_data *mca = cl->host;
+	struct snd_soc_pcm_runtime *fe = NULL;
 	struct snd_soc_dpcm *dpcm;
 
-	fe = NULL;
-
-	for_each_dpcm_fe(be, substream->stream, dpcm) {
+	for_each_dpcm_fe(be, stream, dpcm) {
 		if (fe && dpcm->fe != fe) {
-			dev_err(mca->dev, "many FE per one BE unsupported\n");
-			return -EINVAL;
+			dev_err(be->dev, "many FE per one BE unsupported\n");
+			return NULL;
 		}
 
 		fe = dpcm->fe;
 	}
 
+	return fe;
+}
+
+static int mca_be_startup(struct snd_pcm_substream *substream,
+			  struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *be = snd_soc_substream_to_rtd(substream);
+	struct snd_soc_pcm_runtime *fe = mca_be_get_fe(be, substream->stream);
+	struct mca_cluster *cl = mca_dai_to_cluster(dai);
+	struct mca_cluster *fe_cl;
+	struct mca_data *mca = cl->host;
+
 	if (!fe)
 		return -EINVAL;
-
 	fe_cl = mca_dai_to_cluster(snd_soc_rtd_to_cpu(fe, 0));
 
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {

-- 
2.49.0